JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 



TOKYO, JAPAN. 



VOL. XIX., ARTICLE 15. 



Peroxylaminesulphonates and Hydroxylamine- 



trisulphonates (Sulphazilates 



and Metasulphazilates, Fremy). 



By 



Tamemasa Haga, D. Sc, Professor of Chemistry, 

 Imperial University, Tokyo. 



Perhaps the most interesting of the sulphazotised salts discovered 

 by Fremy (Ann. Chim. Phys., 18-15, iii, 15, 408) are the two which 

 result from the oxidation of one or other of the potassium hydroximino- 

 sulphates (hydroxylaminedisulphonates) in aqueous solution by either 

 silver oxide or lead peroxide or some other reagent. One of these 

 products is the very unstable salt which he named sidphazilatc. It is 

 remarkable for crystallising from its aqueous solution, which is of an 

 intense bluish-violet colour, in brilliant golden-yellow needles, very 

 slightly soluble in ice cold water, but easily dissolving in hot water. 

 It can seldom be long preserved and gives a disagreeable odour to the 

 skin, like that caused by manganates and ferrates. According to 

 Fremy, it is easily fusible, but that is a mistake; it is the products of 

 its decomposition which melt. The other salt, his metasulphazilate, is 

 also sparingly soluble in cold water, but is colourless and has con- 

 siderable stability. It crystallises in rhombic prisms which are so well 

 defined that Fremy describes the compound as being the most beautiful 

 of all the sulphazotised salts. These crystals appear to be isomorphous 



